函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\printk\printk_safe.c Create Date:2022-07-27 11:07:51
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：printk_safe_flush_on_panic - flush all per-cpu nmi buffers when the system* goes down.* Similar to printk_safe_flush() but it can be called even in NMI context when* the system goes down. It does the best effort to get NMI messages into

函数原型：void printk_safe_flush_on_panic(void)

返回类型：void

参数：无

272  如果raw_spin_is_locked( & The logbuf_lock protects kmsg buffer, indices, counters. This can be taken* within the scheduler's rq lock. It must be released before calling* console_unlock() or anything else that might wake up a process.)则
273  如果num_online_cpus()大于1则返回
276  Generic 'turn off all lock debugging' function:
277  raw_spin_lock_init( & The logbuf_lock protects kmsg buffer, indices, counters. This can be taken* within the scheduler's rq lock. It must be released before calling* console_unlock() or anything else that might wake up a process.)
280  printk_safe_flush - flush all per-cpu nmi buffers.* The buffers are flushed automatically via IRQ work. This function* is useful only when someone wants to be sure that all buffers have* been flushed at some point.
调用者
名称描述
panicpanic - halt the system*@fmt: The text string to print* Display a message, then perform cleanups.* This function never returns.
crash_kexec